Hyponatremia is a disorder that occurs when the level of sodium in the blood falls below 130mM. Sodium is an electrolyte and helps regulate the amount of water that's in and around the cells. The symptoms of Hyponatremia include headache, nausea and vomiting, fatigue, restlessness and irritability, muscle weakness, spasms or cramps, seizures, loss of appetite.
Hyponatrmia is treated with IV sodium solution given intravenously which raise the sodium levels in the blood. Another way is by taking medications to manage the signs and symptoms of hyponatremia, such as headache, nausea and seizures.
Hyponatraemia occurs in approximately 1% of hospitalised patients. Incidence rates can be much higher in cancer patients.